Can this cut smaller coax, like RG-8X? (HAM here, and the previous pair i bought is apparently for *gigantic* coax i've never seen.)

No there for up to 1in coax cable like cts 625, 700, 750, 875... and so on

Are these big enough to cut 4/0 wire?

Yes they are the best one I ever used splicing cable for Comcast and coax that I ever came a contact with was 0.85 of an inch So it's more than what I've seen in some of the stuff I just read about recommended size but it cut that stuff and if you're just doing it once or one weekend buy them at Harbor Freight Hope it helps I'm trying to attach the size chart that I looked at because it turns out it was from Amazon and that's kind of funny Good luck brother

Will these cut 400 UF coax cleanly (and properly)?

I use these cutters to cut 625 cable, without issue. Also have used these on TX15/flex feeder. I don't see any reason this would not cut 400 cleanly

Would they cut bx cable ? like 12/2 bx

I would not use these to cut armored cable or even plain 12/2. These are designed to cut mainline coax communication cable which is mainly dielectric and aluminum with only a small amount of copper.

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Klein Tools 63030 Cable Cutter, Coaxial Cable Cutter cuts up to 1-Inch Aluminum and Copper Coaxial Cable with One-Hand Shearing, Blue

Klein Tools 63030 Cable Cutter, Coaxial Cable Cutter cuts up to 1-Inch Aluminum and Copper Coaxial Cable with One-Hand Shearing, Blue

Product ID: 397157536

Details

Brand
KLEIN TOOLS
Colour
Blue
Handle material
Plastic
Material
Blend
Product dimensions
21L x 10.2W

🔧Heat-treated, forged steel blades

✂️Cuts up to 1-inch coaxial cable

🖐️One-hand precision shearing

€ 155.11

Duties & taxes included

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Description

✂️ Cut with confidence, work with pride.

COMFORT MEETS CONTROL - Ergonomic plastic-coated handles deliver maximum grip and comfort during extended use.
COMPACT LIGHTWEIGHT DESIGN - Fits seamlessly into your professional tool pouch for on-the-go efficiency.
EFFORTLESS ONE HAND SHEARING - Precision cutting without frayed ends or compression for flawless cable prep every time.
TRUSTED AMERICAN CRAFTSMANSHIP - Backed by over 160 years of Klein Tools’ legacy, made in the USA for professionals who demand the best.
BUILT TO LAST WITH FORGED STEEL - Heat-treated, precision-ground blades ensure durability that keeps up with your toughest jobs.

The Klein Tools 63030 Cable Cutter expertly slices through up to 1-inch aluminum and copper coaxial cables with a single hand. Featuring heat-treated forged steel blades and ergonomic plastic-coated handles, this durable, precision tool ensures clean cuts without fraying or compression. Compact and lightweight, it’s designed for professionals who value reliability and comfort, proudly made in the USA by a family-owned company with over 160 years of expertise.

Specifications

ASIN	B001BY28YA
ASIN	B001BY28YA
Brand Name	KLEIN TOOLS
Color	Blue
Customer Reviews	4.7 4.7 out of 5 stars (350)
Customer reviews	4.7 4.7 out of 5 stars (350)
Cutting width	1 Inches
Date First Available	6 August 2012
Department	Unisex-Adult
Global Trade Identification Number	00092644630309
Grip Type	Ergonomic
Handle Material	Plastic
Included Components	Cable Cutter Coaxial 1" Capacity
Is Discontinued By Manufacturer	No
Item Dimensions L x W	21L x 10.2W centimeters
Item Type Name	Klein Tools Cable Cutter Coaxial 1-Inch Capacity 63030
Item Weight	354 g
Item model number	63030
Manufacturer	KLEIN TOOLS
Manufacturer	KLEIN TOOLS
Manufacturer Part Number	63030
Material Type	Blend
Model Number	63030
Product Dimensions	20.96 x 10.16 x 2.54 cm; 353.8 g
Set Name	Klein Tools
Specific Uses For Product	Professional
Specification Met	Inferred: Compliance with unspecified US tool manufacturing standards
UPC	092644630309
Unit Count	1 Count

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